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Power Strokes
6.7 Aftermarket
13-16 Spartan tuning
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[QUOTE="SpartanDieselTech, post: 1300043, member: 22311"] The revisions of the 600HP file that went to production should be *relatively* safe. Please note I'm saying relative- if it's abused over a long period of time, it will still fail. The later techniques I used to bring slip times down for the 4-5 shift will buy it some time, compared to the files I destroyed the trans in our test truck with earlier in testing. Only the 4-5 upshift (namely the C35R clutch) is susceptible to accelerated wear at the 600HP level, and that upshift occurs at around 84mph on a 3.55 gear truck and 265/75/R20 tires. So, unless you are WOT through that shift frequently (1/4 mile or longer) you typically won't see that upshift at WOT anyway. [/QUOTE]
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